The following table shows the marginal benefit per year (in dollars) to all the households in a small community from the hiring of additional firefighters. The table also shows the marginal cost per year (in dollars) of hiring additional firefighters. Number of Firefighters Marginal Benefit for the Community Marginal Cost 1,000,000 34,000 2 500,000 35,000 300,000 36,000 4 100,000 37,000 70,000 38,000 50,000 39,000 40,000 40,000 30,000 41,000 20,000 42,000 10 10,000 44,000 What is the optimal amount of this public good (in terms of the number of firefighters)? Optimal amount = firefighters